[Metazoon parasites of the marsh frog (Rana ridibunda PALLAS 1771; Anura) collected from the different regions in Turkey.].

Fifty-three marsh frogs, Rana ridibunda, that were collected during the period from 1998 to 2004 from 4 different regions of Turkey and variable extended localities, were examined for helminths. As a result of our study 16 species of metazoan parasites were found. These included 9 Digenea, 4 Nematoda, 2 Acanthocephala and 1 Hirudinea. Pleurogenoides stromi, Cosmocerca ornata, Neoxsyomatium brevicaudatum, Oswaldocruzia filiformis, Eustrongylides excicus and Centrorhynchus spp. were detected. This is the first time that Rana ridibunda has been reported in Turkey.